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Summary: Ctors | Methods | Inherited Methods

# PasswordCallback

`public class PasswordCallback`
`extends Object` `implements Callback, Serializable`

java.lang.Object
↳ | javax.security.auth.callback.PasswordCallback

Underlying security services instantiate and pass a `PasswordCallback` to the `handle` method of a `CallbackHandler` to retrieve password information.

See also:

- `CallbackHandler`

## Summary

### Public constructors
`PasswordCallback(String prompt, boolean echoOn)` Construct a `PasswordCallback` with a prompt and a boolean specifying whether the password should be displayed as it is being typed.

### Public methods
`void` | `clearPassword()` Clear the retrieved password.
`char[]` | `getPassword()` Get the retrieved password.
`String` | `getPrompt()` Get the prompt.
`boolean` | `isEchoOn()` Return whether the password should be displayed as it is being typed.
`void` | `setPassword(char[] password)` Set the retrieved password.

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

## Public constructors

### PasswordCallback

    public PasswordCallback (String prompt,
                    boolean echoOn)

Construct a `PasswordCallback` with a prompt and a boolean specifying whether the password should be displayed as it is being typed.

Parameters
`prompt` | `String`: the prompt used to request the password.
`echoOn` | `boolean`: true if the password should be displayed as it is being typed.

Throws
`IllegalArgumentException` | if `prompt` is null or if `prompt` has a length of 0.

## Public methods

### clearPassword

    public void clearPassword ()

Clear the retrieved password.

### getPassword

    public char[] getPassword ()

Get the retrieved password.

This method returns a copy of the retrieved password.

Returns
`char[]` | the retrieved password, which may be null.

See also:

- `setPassword(char[])`

### getPrompt

    public String getPrompt ()

Get the prompt.

Returns
`String` | the prompt.

### isEchoOn

    public boolean isEchoOn ()

Return whether the password should be displayed as it is being typed.

Returns
`boolean` | the whether the password should be displayed as it is being typed.

### setPassword

    public void setPassword (char[] password)

Set the retrieved password.

This method makes a copy of the input password before storing it.

Parameters
`password` | `char`: the retrieved password, which may be null.

See also:

- `getPassword()`

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